Microstomia


Microstomia is a small mouth

Congenital

It is a feature of many craniofacial syndromes, including Freeman–Sheldon syndrome and Sheldon-Hall syndromes. It may present with whistling-face feature, as well, as in Freeman-Sheldon syndrome. In this syndrome, it impairs alimentation and may require repeated oral surgeries to improve function.

Acquired

Microstomia can occur as a result of scarring due to many conditions. It is seen as complication of facial burns.
It can also be a feature of systemic scleroderma.